{
  "format": "text/plain",
  "bibcode": "2025GCN.40575....1A",
  "eventId": "GRB 250527D",
  "subject": "GRB 250527D: CALET Gamma-Ray Burst Monitor detection",
  "submitter": "Yuta Kawakubo at Aoyama Gakuin University <kawakubo@phys.aoyama.ac.jp>",
  "body": "Y. Akaike (Waseda U), A. Yoshida, T. Sakamoto, S. Sugita, Y. Kawakubo (AGU),\nK. Yamaoka (Nagoya U), S. Nakahira (JAXA), Y. Asaoka (ICRR), S. Torii,\nK. Kobayashi (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U),\nN. Cannady (GSFC/UMBC), M. L. Cherry (LSU), S. Ricciarini (U of Florence),\nP. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe long GRB 250527D (Swift/BAT-GUANO localization skymap: DeLaunay et al.,\nGCN Circ. 40573) triggered the CALET Gamma-ray Burst Monitor (CGBM)\nat 23:38:44.85 UTC on 27 May 2025\n(https://cgbm.calet.jp/cgbm_trigger/flight/1432424119).\nThe burst signal was seen by all CGBM detectors.  \n\nThe burst light curve shows a multi-peaked structure that starts\nat T+2.1 sec, peaks at T+5.1 sec, and ends at T+5.6 sec.\nThe T90 and T50 durations measured by the SGM data are 3.1 +/- 0.2 sec\nand 1.7 +/- 0.2 sec (40-1000 keV), respectively.\n\nThe ground-processed light curve is available at\n\nhttps://cgbm.calet.jp/cgbm_trigger/ground/1432424119\n\nThe CALET data used in this analysis are provided by\nthe Waseda CALET Operation Center located at Waseda University.",
  "circularId": 40575,
  "submittedHow": "web",
  "createdOn": 1748574128610
}